21297780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16903}}^1$

素因数の和:16925

約数の個数: 72

約数和(自身を含む): 73836672

約数和(自身を除く): 52538892

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16903, 33806, 50709, 67612, 84515, 101418, 118321, 152127, 169030, 202836, 236642, 253545, 304254, 338060, 354963, 473284, 507090, 591605, 608508, 709926, 760635, 1014180, 1064889, 1183210, 1419852, 1521270, 1774815, 2129778, 2366420, 3042540, 3549630, 4259556, 5324445, 7099260, 10648890, 21297780]

約数ペア:

[(1, 21297780), (2, 10648890), (3, 7099260), (4, 5324445), (5, 4259556), (6, 3549630), (7, 3042540), (9, 2366420), (10, 2129778), (12, 1774815), (14, 1521270), (15, 1419852), (18, 1183210), (20, 1064889), (21, 1014180), (28, 760635), (30, 709926), (35, 608508), (36, 591605), (42, 507090), (45, 473284), (60, 354963), (63, 338060), (70, 304254), (84, 253545), (90, 236642), (105, 202836), (126, 169030), (140, 152127), (180, 118321), (210, 101418), (252, 84515), (315, 67612), (420, 50709), (630, 33806), (1260, 16903)]